Question

the perimeter of a long bench is 6.8 if its breadth is 1 metre what is its length​

Answer 1

Answer:

2.4

Step-by-step explanation:

perimeter = 2(l+b)

putting values in it

answer will come

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Answer 2

Answer:

Given:-

The perimeter of a long bench is 6.8 metre, if its breadth is 1 metre what is its length?

To Find:-

The length.

Note:-

●》The long bench is a rectangle and hence, rectangle = 2 × ( Length + Breadth ).

●》Sometimes for finding some unknown value we rearrange its side, during that time

⊙ positive becomes negative

⊙ negative becomes positive

⊙ multiple becomes divisional

⊙ divisional becomes multiple.

Solution:-

Perimeter = 6.8 m, Breadth = 1 m, Length = ?; Let length be "x"

☆ According to note first point~

▪︎$Perimeter \ \ of \ \ long \ \ bench = 2 × ( Length + Breadth )$

▪︎$6.8m = 2 × ( x + 1m )$

☆ After doing bracket calculations ( as variable + constant is always = variable + constant )~

▪︎$6.8m = 2 × x + 1m$

▪︎$6.8m = 2x + 1m$

☆ According to note second point ( rearrangement)~

▪︎$6.8m ÷ 2 = x + 1m$

▪︎$3.4m = x + 1m$

▪︎$3.4m - 1m = x$

☆ After doing subtraction~

▪︎$2.4m = x$

Checking:-

Now, let's check that perimeter of long bench = 2 × ( length + breadth ) or not?

• $Perimeter \ \ of \ \ long \ \ bench = 2 × ( length + breadth ) \ \ ?$

♤ Applying the value~

• $6.8m = 2 × ( 2.4m + 1m ) \ \ ?$

• $6.8m = 2 × 3.4m \ \ ?$

• $6.8m = 6.8m \ \ ?$

Yes!

Hence, Proved that length = 2.4m

Answer:-

Hence, the length of long bench = 2.4m

:)